Clutch.



-E. I. WILSON.

` CLUTCH. APPLICATION FILED AUGZI. H3131 I zbented De@ II, 1917.

I /I f L@ www II WA www @Mm dil EMERY J', WILSON, F CLEVELAND; ORIG.

CLUTCH.. i

To eZZwwm 15mm/concern.' p

Be it known that I, Eimer J. WILSONa Aa citizen of the United States, residing1 at Cleveland, in the county of Cuyahogaand State of Ohio, have invented certain nevv and useful improvements infClutches, `oi'E which the following; isaspeciiication.

rllhis invention relates to improvements in clutches generally and particularly to those ot the band type. y

More specifically the invention `relates `.to elutchingg-` mechanismadapted `to be farranpged ibetvveenga driving `Igearand a drum and consisting of a .clutchhe-nd adaptedrto be tightened by suitable levers which are operated troman'operatng arm adaptedto be in turnoperated from roller bearing; mechanism arranged between the xarm and a springpressed lever, the arrangementot the parts being;r such that the `rollerbearing` member `may assume a position for operatingthe arlnin one directionto release `the band and .may be moved into another `position `to cause the saine tendencyof the spring` pressed lever to shift the armandset `the band. i

The. invention may be `further;` briefly summarized as ,consisting in the construction and combination of parts rhereinafter set `forth in the following description, .drawings and claims. i

Referring; tothe drawings. ligurel isfa side-` elevation of `a portiono'a gear Wheel showing` the device applied; Figffisa vertical :section` on the` line heeft, Fig'. .1, `through `the center of `the device showing;

someottheparts in elevation; .Fig 3 isa detail viermand Fin'. eiis arsectionallplan "vievv on the line BT-BQMShOvviHg; :certain of the operating; levers. t y

ln` carrylne;` outthefinvention any pre `lierred. form and .i construction of `parts may combination. i

AlFriggid with the pgrear.andprelierably` forminrr-a ,part thereof` .1s `a :pair ot' bracket ameni- .tbersslponevonieahr side .oft thetrtebeef the specifieanoa of Letters Patent.

`and 24. This cross toma rod Si pivotally connected to `an p op- PatentedDee. `11, 191%.

`Appleetion.le` Augustl, 1913. Serial No. 785,927.

gear 2 which `support trnnnions 5 of Athe rocker member (i. This. rocker member is provided with ears 7 which receive a pin 8 passingthrough the loops in the end oa clutch band 9 Which is provided With `the usual `asbestos or other facing; l for engagement with the periphery `of the drum 3; rit asuitable angle with respect to the ears "this rocker` member is provided With an operating arm l1 pivotally connected `to a link 12 for a purpose to be described.

,Mounted in the brackets i are trunnions 13 of a light end pull rocker memberld provided" with a crankarrn 15 shown partially in `fulland.dottedlines in Fig'. l, and connected in the eye of a bar l@ threaded into a suitableturn buckle 17. rllhis tnrn .buekle is threaded onto lthe end oia bar 18 secured to the other end of `the clutchbanjd 9. Forming a part ot the light end pull rocker member 14 is a clutch tightening arm 19 providedwith a straight lower edge'wZU entendingon both sides of the radius drawn from .thewcenter of `the tightening rocker member at rightanpgles to the edge 20. Mounted in `.this tightening' arm L19 is a pin 21 pivotally connected to the link l2 at` a point such that there is, a dilierential movementof the `parts and there `is a sort oitmliftine action "conveyed to `the light end pull rocker member 119 through the lever l1. Secured toanear@.formedon the inner peripllery otrthe g'earis an energizing` lever- 23 llaving` av straight iiace p2-fle coextensive Withthe tace@ and adapted to be substantially parallehwith respect thereto when the` clutchis set. Secured to this lever preferably intermediate its endspisla connection 25 having;- a shank 2G extending down` through a boss 9.7 forming apart of the gear. Thisshankreceives a compression spring 29 arranged betweenthe boss and a washer` 29held inposition byiay nut 30. Airanpgedibetween the` edge EZLlJUotthe energizinglever andthe edge `20 oi'ithe ti.frhteninp;` arm is cross head Slcarryingr apair of rollers` and avhich roll one aeainstthe other and against the edgesZO head member is `seeured erating' lever 35 pivoted upon a pin Sfsuppportedin the web, oiifthe gear. This lever is conneetedby asuitable link B'fto `one upon the shaft 1. I prefer to key the bell crank lever 38 t0 an upright shaft 42 mounted in the boss of the gear and to provide a lever 43 at the upper end and connected by a` link 44 with the sleeve 41. Any suitable mechanism may be provided for shitting the sleeve 41.

In operation, assuming that the parts are in the position shown in F ig. 1, when the clutch is set and that the operator wishes to release the clutch, the clutch sleeve 41 is shifted to the right, as shown in Fig. 2, with the result that the lever 35 is moved to the left, as shown in Fig. 1, when the cross head with the rollers S2 and 33 will be moved to the left until they pass beyond the perpendicular extending from the edge 20 to the center of the pivot 13, when the force of the spring 28 through the lever 23 will cause the tightening arm to operate in a clockwise direction, with the result that the crankv arm 15 will tend to loosen the band when the gear will rotate Vfree of the drum. IVhen the clutch is to be set, the parts are operated in a reverse direction and the cross head is moved to any desired'poi'nt along the edges 2O and 211 with the result that the lever ratio between the energizing device and the tightening arm is varied to the proper extent to meet the required conditions.

The arrangement of the differential mechanism is such that the pull on the band 9 caused by the rotating gear and the rictional drag of the drum tends to give the lever 11 a counter clockwise movement, with the result'that the link 12 pulls upon the arm 19 tending to give it a counter-clockwise movement also. In this way the heavy end pull assists the light end pull, and the action of the energizing device. y l

Having described my invention, I claim l:

1. In a clutch, a driving element, a driven element, and clutching mechanism between said elements comprising a clutching device, operating means therefor, an energizing device iXed against bodily movement, and means between said energizing device and the clutch operating means for causing the former to exert its .force either to release the clutch or to set it.

2. In a clutch, a driving element, a driven element, and clutching mechanism between said elements comprising a clutching device, operating mechanism therefor, an energizing device fixed against bodily movement, and means for varying the effect of the energizing device upon the operating mechanism in either the setting or releasing operation.

3. In a clutch, aV driving element, a driven element, and clutching mechanism between said elements comprising'aclutching lde- 'vice;operatm'g'm'echanism therefor', an energizing device 'coperatmg with the` operat- Lasagne in'gm'echanism to actnate the clutch, said energizing device being fixed against bodily movement, and means for varying the eil`ect of the energizing device on the ope ating mechanism.

4. The combination with a drum, 0i a band coperating therewith, operating mechanism for setting and releasing the band upon said drum, an energizing device, and means between the operating mechanism and the energizing device lor causing the latter to exert its force either to set or release the band.

5. The combination with a drum, ot a band coperating therewith, operating mechanism for setting and releasing the band upon said drum, an energizing device, and means for varying the eect of the energizing device on the operating mechanism in either the setting or releasing operation.

6. In a clutch, a driving element, a driven element, and clutching mechanism between said elements comprising a clutching device, operating means therefor including an operating arm, an energizing device fixed against bodily movement, and means between the energizing device and the operating arm for transmitting the force of the energizing device to the operating arm for either the release or the setting operation.

7. In a clutch, a driving element, a driven. element, and clutching mechanism between said elements comprising a clutching dcvice, operating means therefor including` an operating arm, an energizing device fixed against bodily movement, and a movable member arranged between the operating arm and the energizing device for varying the eti'ective length of the operating arm.

8. In a clutch, a driving element, a driven element, and clutching mechanism between said elements comprising a clutching device, operating means therefor including an operating arm, a lever, means normally tending to move said lever said means being iixed against bodily movement, and means tor transmitting the vforce of said lever to the operating arm and for varying the lever ratio between the two.

9. In a clutch, a driving element, a driven element, and clutching mechanism between said elements comprising a clutching device, operating means therefor including an operating arm, a lever, means normally ltending to move said lever.A a cross head arranged between said arm and said lever and adapted yto vary the lever ratios between the two for both the release and the setting operation, and means for operating said cross head.

10. In a clutch, a driving element, a driven element, and clutching mechanism between said elements comprising a clutching device, operating means therefor including an operating arm, a spring actuated lever, a roller hearing cross head arranged between said arm and said spring pressed lever and adapted to vary the lever ratios hetween the two for both the release ancl the setting operation, and means for operating' said roller bearing cross head.

l1. in a clutch, a driving element, a driven element, and clutch mechanism between said elements comprising a clutching device, cliterential operating mechanism between the same comprising a rocker arm for the light encl pull, a rocker arm for the heavy end pull, suitable connections between said rocker arms whereby the pull on the rocker arm for the heavy end pull will assist in the operation of the rocker arm for the light end pull in the setting operation, and means for actuating said differential operating mechanism and consisting of an operating lever arm, an energizing device, and means arranged between the operating lever arm and the energizing device :tor Varying the lever ratio in the setting operation.

ln testimony whereof I alix my signature in presence of two witnesses as follows:

EMEBY J. WILSON. Witnesses:

T. O. FABGUHARsoN, C. H Tensen.

topics of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. U. 

